Variable beat-up motion for looms



July 11, 1950 M. D. HANEY 2,514,603

VARIABLE BEAT-UP MOTION FOR LOOMS Filed April 29, 1947 5 Sheets-Sheet ljun} H, 1959 HANEY 2,514,693

VARIABLE BEAT-UP MOTION FOR LOOMS Filed April 29, 1947 3 Sheets-Sheet 2M4200: 0. MM/Er.

July 11, 1950 D, HANEY 2,514,693

VARIABLE BEAT-UP MOTION FOR LOOMS Filed April 29, 1947 3 Sheets-Sheet 3Show 57mke DAcK STROKE P/cK 2 9 2/ Takeup 2 P/cks bAc'K STROKE D/c K 35/2014 Sfmke @ACK STROKE.

p/CK 4 10/77 Sfroke b/lck STROKE 4 Patented July 11, 1950 UNITED STATESPATENT OFFICE Marcus D. Haney, Spindale, N. 0.

Application April 29, 1947, Serial No. 744,634

This invention relates to improvements in looms whereby the effectivethrow of the lay is varied to thus vary the overall length of the pitmanrods, that is, the overall distance between the lay of the loom and thecrank shaft of the loom to thus vary the length of beat-up of thefillings and means can also be provided if desired whereby the clothtake-up can be intermittently operated to thus produce mesh cloth orlace cloth and this is done by placing two Warp threads in alternatedents in the lay and so timing the mechanism for varying the effectivestroke of the pitman rods to cause, for example, two fillings to be beatup in close proximity to each other and then to cause the next twofillings to be spaced from the previously woven fillings to thus providesquare openings in the cloth to provide a mesh cloth, lace cloth and thelike. This is effected by having a shaft extending between the twoswords of the loom and on the ends of this shaft eccentric portions areprovided on which one end of the pitman rods which connect to the swordsof the loom are mounted, the other ends of the pitman rod being mountedon the crank throws of the crank shaft and means are driven from theloom, preferably the cam shaft, for rotating the shaft associated withthe swords of the lay of the loom to thereby vary the positions of theeccentrics on the shaft and to thus cause a pair of beat-ups with alengthened stroke and the next two pairs of beat-ups with a shortenedstroke and thus mesh cloth, lace cloth and the like can be provided.

The invention broadly relates to an eccentric connection between thepitman rod and the lay of the loom whereby the stroke of the lay isvaried in regular cycles in order to beat up two fillings in closeproximity to each other, at the same time the warp threads being spacedapart from each other such as by placing two warp threads in alternatedents of the reed in the lay.

It is therefore an object of this invention to provide a loom havingvariable stroke of the lay whereby needle point canvas, lace cloth andth like having a mesh effect can be woven in a conventional loom by useof the modifications therein embodied.

Some of the objects of the invention having been stated, other objectswill apear as the description proceeds, when taken in connection withthe accompanying drawings, in which Figure 1 is a vertical sectionalview through a loom and showing my invention applied thereto;

Figure 2 is a p plan view of the central portion of the loom and takensubstantially. along '7 Claims. (Cl. 139190) the line 22 in Figure 1 andshowing the bow of the fram of the loom in section;

Figure 3 is an isometric view of the improved inechanism associated withvarious parts of the Figure 4 is a top plan view with portions brokenaway showing the eccentric connection between the pitman rod and-one ofthe swords of the loom;

Figure 5 is an elevation taken along the line 5-5 in Figure 4 andomitting the sword portion which would be associated therewith;

Figure 6 is an enlarged detail of a portion of the cloth woven with thisimproved mechanism;

Figure 7 is a schematic view,,showing the positions of the eccentricsduring weaving.

Referring more specifically to the drawings, the numeral It) indicatesthe side frame members of a loom joined together by suitable girts suchas I I and I2. This-loom has suitable notches M in which the spindles l5at each end of a warp beam l6 are mounted, and it also has a sand rollI! and a cloth take-up roll l8 as well as a bow l9 connecting the twoside frame portions of the loom. The loomalso has a suitable crank shaft2| and a cam shaft 22 and. a rocker shaft 23 on which is oscillatablymounted the lower ends of swords 24. On the upper ends of the swords 24is mounted a lay 25 and also a reed cap 26 accommodating a reed 2'! forbeating up the filling in the cloth 28 being woven. The crank shaft 2!has a pair of cranks 36 integral therewith to which are connected oneend of pitman rods 3|, the other ends of thes pitman rods beingoscillatably connected between the ears 33 and 3 which are integral withthe swords 24 of the loom. Heretofore, the ears 33 and 3 3 have beenpenetrated by a pin which also penetrates the other end of the pitmanrods 3|. This gave a definite and uniform length of stroke to the lay ofthe loom upon each oscillation of the crank shaft 2|.

Instead of having theseordinary pins for connecting the pitman rods tothe swords, I provide a shaft 3'6 which is mounted for rotation in thelugs or ears 33 and 34 and each end of this shaft 35 has an eccentricportion 3'! integral therewith and the extreme ends of the shaft 36 havea central smaller portion 38 which isconcentric with the shaft 36.

The eccentric portion 31 penetrates a suitable hole in one end of thepitman rods 3|. c In order to vary the length of stroke of the reed 31in a beat-up operation I provide on the cam shaft 22 a sprocket wheel 40having, a, sprocket chain 4| 3 mounted thereon and on the rock shaft 23I mount in a rotatable manner a sleeve 39 havin sprocket wheels 43 and44 integral therewith. The sprocket chain 4| is also mounted on thesprocket wheel 43 and rotation of sprocket wheel 43 imparts rotation tosprocket wheel 44 which is integral with sprocket wheel 43. Sprocketwheel 44 has mounted thereon a sprocket chain 45 which is also mountedon a sprocket wheel 46 fixedly secured on the shaft 36. The sprocketwheels 44 and 45 are of the same size, and sprocket Wheel 40 has thesame circumference as the sprocket wheel 43 and therefore the shaft 36is rotated the same number of revolutions per minute as the cam shaft22, which means that the shaft 36 will make a complete revolution whilethe cam shaft 22 is making a complete revolution.

In making needle point cloth, canvas, lace cloth or mesh cloth, orwhatever name it may be called, it will be noted that the splits of thereed 21 are indicated at 50 and. the warp threads are indicated at 51.Two warp threads "5| are passed through alternate dents. With the lowside of the eccentrics 31 disposed nearest to the crank shaft as shownat pick I Figure 7, a pick of filling 52 is projected through the shedin the warp threads 5| and beat up to the position shown in Figure 6with the eccentrics 3! in the position at pick I. While the crank shaftmakes another complete revolution, no take-up wil1 be effected in thecloth roll and with the eccentrics 3'! disposed in the position shown atpick 2 or over next to the crank shaft, and the second filling 53 havingbeen projected across the shed, the beat-up will take place with theshaft 36 rotated one-half revolution from the previous pick and duringthe beat-up of filling 53 it will be pushed against the filling 52 andmay slightly advance filling 52. Then while the shaft 36 is makinganother half revolution for the crank shaft to advance the reed 21 andbefore the next filling 52 is projected through the shed, the take-upmechanism will take up two picks if desired to thus increase the widthof openings 56 between the filling 53 and the next filling 52. This willof course cause the overall length of the pitman rods 31 to be shortenedfor pick 3 and filling 52 will be placed in the warp threads at thepoint shown in the drawings, then while the next filling 53 is beingprojected across the shed and while the pick shaft is making anotherrevolution, no take-up will be effected until after the filling 53 hasbeen thrown in the same manner as the previous filling 53 and thefilling 53 will be beat up with the eccentric portion 31 projectedtowards the crank shaft to beat the filling 53 against the filling 52 inthe same manner as filling 53 has been previously beaten up against thefilling 52 to thus leave the openings '56 and this will continuethroughout the weaving of a piece of cloth of any desired length. Inother words, the first filling of a set is beat up with the overalldistance between the crank shaft and the sword shortened and the'secondbeat of a set is beat up with the overall distance between the crankshaft and the swords lengthened which will cause the second filling topush forwardly towards the top of Figure 6 to push the first fillingslightly further along the warp threads along with the second filling toprovide two fillings in close proximity to each other, and then whilethe crank shaft is making another revolution and the next filling isthrown, the. take-up motion will take up the distance of two picks whichwill cause the vacanciesbetween the two sets of fillings.

In other words it is well known that the cam shaft 22 makes onerevolution while the crank shaft 2| makes two revolutions. It is alsoseen that the shaft 36 will make one revolution while the crank shaft ismaking two revolutions,

Even if the cloth take-up were not idled between the picls 52 and 53these fillings would be close together, and even if the cloth take-upwere not operated to move the. cloth two picks before the next filling52 was thrown, there would be a substantial space 55 between the sets offillings.

By referring to Figure 7 it is seen that fillings 52 are beat up withthe effective length of the pitman rods shortened on picks I and 3 andon picks 2 and 4 the effective length of the pitman rods would beincreased.

By referring to Figure 7, it is seen that the timing is such that theshaft 36 makes one complete revolution while the crank shaft 2| ismaking two complete revolutions. Therefore, it is seen that on picks 2and 4 the lay of the loom will be further away from the crank shaft thanit will be on picks I and 3, thus a set of filling threads will be wovenon picks 2 and 4 and then on picks I and 3 a second set of fillingthreads will be Woven, which with the effective beat-up strokedecreased, the spaces 56 between the sets of filling threads will beformed. This can beaccentuated by having the cloth take-up motionactuated two picks between the sets of filling and by not having thetake-up motion actuate any at all between the two picks of each of thesets of fillmg.

In the drawings and specification there has been set forth a preferredembodiment of the invention, and although specific terms are employed,they are used ina generic and descriptive sense only, and not forpurposes of limitation, the scope of the invention being defined in theclaims.

I claim:

1. In a loom having a cam shaft and a crank shaft and a rocker shaftprovided with a pair of swords oscillatably mounted at their lower endson the rocker shaft and having a lay secured to their upper ends, saidcrank shaft having a pair of cranks thereon, a pitman rod having one endmounted on each crank and a pivotal connection between the other end ofthe pitman rod and the swords, said pivotal connection comprising aconstantly driven rotary shaft mounted in both swords and having aneccentric portion near each end thereof around which one end of thepitman rods are mounted, means driven by the cam shaft for constantlyrotating the shaft having eccentric portions thereon to shorten thethrow of the lay on alternate picks and to lengthen the stroke of thelay on the other picks during operation of the loom to thus provide openspaces between the fillin picks at regular intervals throughout thecloth being woven, the crank shaft having a speed of twice the number ofrevolutions per minute as the shaft having the eccentrics thereon.

2. In a loom having a rocker shaft and a pair of swords oscillatablymounted on the rocker shaft andhaving a lay secured on the upper endsof'the said swords, said loom having a crank shaft and a cam shaft and apair of pitman rods mounted at one end on the crank shaft and havingtheir other ends pivotally connected to the swords, the pivotalconnection between the pitman rods and the swords comprising aconstantly driven rotary shaft extending from one sword to the other andhaving an eccentric portion'on each end thereof adjacent said swords onwhich the ends of the pitman rods adjacent the sword are mounted, meansdriven by the cam shaft of the loom for rotating the rod having theeccentric portions on its ends during operation of the loom at a speedwhich is one-half the revolutions per minute as that of the crank shaftto thereby shorten the beat-up stroke of the lay on alternate picks andto lengthen the beat-up stroke on the intervening picks to thereby formspaces between certain of the filling threads which are woven in theloom.

3. In a loom having a crank shaft and an oscillatable lay and a pair ofpitman rods connected to the crank shaft at one end and to the lay atthe other end, the connection between the pitman rods and the laycomprising a constantly driven rotatable shaft having an eccentricportion on each end thereof on which the end of the pitman rods adjacentthe lay are mounted, and means driven by the loom for rotating the shafthaving the eccentrics thereon at a speed which is one-half therevolutions per minute as that of the crank shaft for varying the lengthof stroke of the lay during operation of the loom.

4. In a loom having a cam shaft and a crank shaft and a lay and a pairof oscillatable swords on the upper ends of which the lay is mounted, ashaft rotatably mounted in the swords means driven by the loom forconstantly rotating the last-named shaft at a speed which is one-halfthe revolutions per minute as that of the crank shaft, the last-namedshaft having an eccentric on each end thereof and a pair of pitman rodshaving one end mounted on the eccentric portions of the last-named shaftand the other ends of the pitman rods being mounted on the crank throwsof the crank shaft, means for rotating the shaft having the eccentric oneach end being timed to cause the shaft having the eccentric on each endto be rotated one revolution while the cam shaft is rotated tworevolutions to thereby cause the high side of the eccentrics on theshaft to be advanced towards the lay on alternate picks and to beadvanced towards the crank shaft on the intervening picks whereby pairsof filling threads will be woven in close relation and spaces will beprovided between the pairs of filling threads.

5. In a loom having a cam shaft, a rocker shaft and a crank shaftprovided with a pair of crank throws, and havin the lower ends of a pairof swords oscillatably mounted on the rocker shaft and a lay fixedlysecured on the upper ends of the swords and having a reed cap fixedlysecured on the extreme upper ends of the swords, the swords havingspaced projections near their upper ends and projecting towards thecrank shaft, a rotatable shaft mounted in the spaced projections,eccentrics fixedly mounted on the shaft and disposed between each pairof projections on the swords, a pair of pitman rods having one endmounted on the crank throws of the crank shaft and having their otherends mounted on the eccentrics, means driven by the cam shaft forimparting constant rotation to the rotatable shaft on the swords at aratio of one complete rotation of the rotatable shaft on the swords toeach two revolutions of the crank shaft, to thereby shorten theeifective length of the pitman rods on alternate beat-ups and toincrease the effective length of the pitman rods on the interveningbeat-ups.

6. In a loom having a cam shaft, a rocker shaft and a crank shaftprovided with a pair of crank throws, and having the lower ends of apair of swords oscillatably mounted on the rocker shaft and a layfixedly secured on the upper ends of the swords and having a reed capfixedly secured on the extreme upper ends of the swords, and the crankshaft rotating at twice the revolutions per minute as the cam shaft theswords having spaced projections near their upper ends and projectingtowards the crank shaft, a rotatable shaft mounted in the spacedprojections, eccentrics fixedly mounted on the shaft and disposedbetween each pair of projections on the swords, a pair of pitman rodshaving one end mounted on the crank throws of the crank shaft and havingtheir other ends mounted on the eccentrics, a driving wheel fixed on thecam shaft, a second driving wheel rotatably mounted on the rocker shaft,a drivin belt mounted on the two driving Wheels, a third driving wheelintegral with and disposed to one side of the second driving wheel, afourth driving wheel fixed on the rotatable shaft mounted on the swords,a driving belt disposed on the third and fourth driving wheels, theratio between the first and fourth driving wheels being of a one to onerelation to thereby cause the rotatable shaft on the swords to make onecomplete revolution while the crank shaft makes two completerevolutions.

7. In a loom having a cam shaft, a rocker shaft and a crank shaftprovided with a pair of crank throws, and having the lower ends of apair of swords oscillatably mounted on the rocker shaft and a layfixedly secured on the upper ends of the swords and having a reed capfixedly secured on the extreme upper ends of the swords, and the crankshaft rotating at twice the revolutions per minute as the cam shaft theswords having spaced projections near their upper ends and projectingtowards the crank shaft, a rotatable shaft mounted in the spacedprojections, eccentrics fixedly mounted'on the shaft and disposedbetween each pair of projections on the swords, a pair of pitman rodshaving one end mounted on the crank throws of the crank shaft and havingtheir other ends mounted on the eccentrics, a sprocket wheel fixed onthe cam shaft, a second sprocket wheel rotatably mounted on the rockershaft, a sprocket chain belt mounted on the two sprocket wheels, a thirdsprocket wheel integral with and disposed to one side of the secondsprocket wheel, a fourth sprocket wheel fixed on the rotatable shaftmounted on the swords, a sprocket chain belt disposed on the third andfourth sprocket wheels, the ratio between the first and fourth sprocketwheels being of a one to one relation to thereby cause the rotatableshaft on the swords to make one complete revolution while the crankshaft makes two complete revolutions.

MARCUS D. I-IANE'Y.

REFERENCES CITED The following references are of record in the file ofthis patent:

UNITED STATES PATENTS.

